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| author | Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> | 2015-10-21 12:17:35 -0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-11-24 17:45:18 -0600 |
| commit | e80e7edc55ba711f3fe23975061b3f1c336ceb95 (patch) | |
| tree | 3719ac21b2b463301894b30dfcbb0719c4e489f6 /drivers/pci | |
| parent | 1ec218373b8ebda821aec00bb156a9c94fad9cd4 (diff) | |
| download | linux-e80e7edc55ba711f3fe23975061b3f1c336ceb95.tar.bz2 | |
PCI/MSI: Initialize MSI capability for all architectures
1851617cd2da ("PCI/MSI: Disable MSI at enumeration even if kernel doesn't
support MSI") moved dev->msi_cap and dev->msix_cap initialization from the
pci_init_capabilities() path (used on all architectures) to the
pci_setup_device() path (not used on Open Firmware architectures).
This broke MSI or MSI-X on Open Firmware machines. 4d9aac397a5d
("powerpc/PCI: Disable MSI/MSI-X interrupts at PCI probe time in OF case")
fixed it for PowerPC but not for SPARC.
Set up MSI and MSI-X (initialize msi_cap and msix_cap and disable MSI and
MSI-X) in pci_init_capabilities() so all architectures do it the same way.
This reverts 4d9aac397a5d since this patch fixes the problem generically
for both PowerPC and SPARC.
[bhelgaas: changelog, make pci_msi_setup_pci_dev() static]
Fixes: 1851617cd2da ("PCI/MSI: Disable MSI at enumeration even if kernel doesn't support MSI")
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/probe.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index edb1984201e9..cd94737af8fd 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1145,7 +1145,7 @@ int pci_cfg_space_size(struct pci_dev *dev) #define LEGACY_IO_RESOURCE (IORESOURCE_IO | IORESOURCE_PCI_FIXED) -void pci_msi_setup_pci_dev(struct pci_dev *dev) +static void pci_msi_setup_pci_dev(struct pci_dev *dev) { /* * Disable the MSI hardware to avoid screaming interrupts @@ -1212,8 +1212,6 @@ int pci_setup_device(struct pci_dev *dev) /* "Unknown power state" */ dev->current_state = PCI_UNKNOWN; - pci_msi_setup_pci_dev(dev); - /* Early fixups, before probing the BARs */ pci_fixup_device(pci_fixup_early, dev); /* device class may be changed after fixup */ @@ -1606,6 +1604,9 @@ static void pci_init_capabilities(struct pci_dev *dev) /* MSI/MSI-X list */ pci_msi_init_pci_dev(dev); + /* Setup MSI caps & disable MSI/MSI-X interrupts */ + pci_msi_setup_pci_dev(dev); + /* Buffers for saving PCIe and PCI-X capabilities */ pci_allocate_cap_save_buffers(dev); |